#include<stdio.h>
 #include<time.h>
 #include<stdlib.h>
 #define N 30000

 int main()
 {
     float x,y;
     int c=0,d=0;
     randomize();
     while(c++<=N)
    
     {
         x=randomize(101);
         y=randomize(101);
         if(x*x+y*y<=10000)
         d++;
     }
     printf("pi=%f\n",4.*d/N);

 }